Botswana's diamond-reliant economy is under severe strain, with the country's main diamond company seeing an almost 50% drop in sales last year, which it blamed on dwindling global demand.

In another blow to the industry in recent months, the US imposed a 37% tariff on all goods imported from Botswana.

In an exclusive interview with the BBC's Waihiga Mwaura in New York, President Duma Boko has stated that Botswana is close to securing a 0% tariff deal with the US, which could provide Botswana with a potential economic lifeline.